SMH4803

SMH4803 Distributed Power Hot-Swap Controller www.DataSheet4U.com FEATURES Supply Range ±20VDC to >±500VDC Versatile Card Insertion Detection Supports Both – Multi-length Pin Systems – Card Injector Switch Sensing Control Up to Four Loads or a Primary Load and 3 DC/DC Converters Highly Programmable Host Voltage Monitoring – Programmable Under- and Over-voltage Detection Programmable Power Good Delays for Sequencing DC/DC Converters Programmable Circuit Breaker Function – Programmable Over-current Filter – Programmable Quick-Trip™ Circuit Breaker Values – Programmable Circuit Breaker Mode Duty-Cycle Mode Latched Mode 2.5V and 5.0V reference outputs – Easy Expansion of External Monitor Functions uri Fe a t Pr ng TM og Quick-Trip ble aker a ra m m re it B u C irc ASSOCIATE MEMBER FUNCTIONAL BLOCK DIAGRAM ENPGB VDD 12V ref PG3# 50kΩ EN/TS 50kΩ PD1# PD2# + Programmable Delay ENPGA 50kΩ Filter PG2# Programmable Delay UV + PG1# Drain Sense 12V + + OV 2.5V ref VSS 5V 2.5V 12V current limit 5.0V ref Vgate Sense CBMode CBReset# CBSense Programmable Delay + Fault Latch & Duty Cycle Timer Vgate 50 mV + Programmable Quick-Trip Ref Voltage CBFault# 2041 BD 8.0 © SUMMIT MICROELECTRONICS, Inc. 2000 300 Orchard City Drive, Suite 131 Campbell, CA 95008 Telephone 408-378-6461 Fax 408-378-6586 www.summitmicro.com Characteristics subject to change without notice 2041 8.4 6/15/00 1 SMH4803 www.DataSheet4U.com Symbol Drain Sense Vgate EN/TS...